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//     题目4: 写一个函数 parseQueryString，它的用途是把 URL 参数解析为一个对象
// 函数名：parseQueryString
// 参数：URL字符串
// 返回值：URL字符串解析后的对象
// 例如：parseQueryString("admin=user&pass=1234") 返回 {admin:"user",pass:"1234"}
    function parseQueryString(URL){
        let arr1 = URL.split("&");
        let obj = {};
       
        for(let i = 0;i<arr1.length;i++){
            let arr2 = arr1[i].split("=")
            obj[arr2[0]]=arr2[1];
        }
        return obj;
    }
    console.log(parseQueryString("admin=user&pass=1234"));
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